Process for co-sintering conductors of copper or copper-base alloys and their ceramic substrate of cordierite
US4915899A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 23, 1989 |
| Grant date | Apr 10, 1990 |
| Priority date | — |
| Expiry date | Jan 23, 2009 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/12056
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
The invention comprises a process for co-sintering of conductors of copper or copper-based alloy and a ceramic substrate, the substrate being produced from a ceramic powder of cordierite type, having a sintering temperature of lower than 950.degree. C. The process comprises the following steps: PA0 (a) shaping of the ceramic substrate from a powder of cordierite type, PA0 (b) deposit of copper on the ceramic substrate, and PA0 (c) co-sintering heat treatment, during which the organic compounds are removed, the copper is regenerated in a reducing atmosphere, and co-sintering of the conductors and the substrate is carried out in a flow of moist inert gas with a plateau at a temperature of between 1065.degree. and 1080.degree. C. The process according to the invention makes it possible to produce substrates of cordierite with internal and external conductors.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.